Whole Home Water GuideWater treatment tool
Salt Usage Estimator
Estimate weekly and monthly softener salt use from grain capacity per regeneration and how often the unit regenerates.
Screening estimate only.Confirm results with a certified water test and a water treatment professional before you buy or size equipment.
Screening result
- Weekly salt use
- Monthly salt use
Fine Print and Sources
Screening estimate only. These tools use only the values you enter and simple planning math. A certified water test and a water treatment professional are authoritative for final sizing, salt settings, and purchase decisions.
Weekly salt equals grain capacity divided by 1000, times the salt efficiency, times regenerations per week. Monthly salt equals weekly times 4.3. Salt efficiency varies by softener, water hardness, and how the valve is programmed.
- USGS Water Science School, hardness of water: gives the water hardness classification bands used here in milligrams per liter as calcium carbonate.